Add two functions one of which finds the lowest level cache defined in
the cache description input, and the other checks if caches are defined
at a particular level.
Signed-off-by: Alireza Sanaee <alireza.sanaee@huawei.com>
---
hw/core/machine-smp.c | 59 +++++++++++++++++++++++++++++++++++++++++++
include/hw/boards.h | 7 +++++
2 files changed, 66 insertions(+)
diff --git a/hw/core/machine-smp.c b/hw/core/machine-smp.c
index 0be0ac044c..4baf4a878e 100644
--- a/hw/core/machine-smp.c
+++ b/hw/core/machine-smp.c
@@ -406,3 +406,62 @@ bool machine_check_smp_cache(const MachineState *ms, Error **errp)
return true;
}
+
+/*
+ * This function assumes l3 and l2 have unified cache and l1 is split l1d
+ * and l1i, and further prepares the lowest cache level for a topology
+ * level. The info will be fed to build_caches to create caches at the
+ * right level.
+ */
+bool machine_find_lowest_level_cache_at_topo_level(const MachineState *ms,
+ int *level_found,
+ CpuTopologyLevel topo_level)
+{
+
+ CpuTopologyLevel level;
+
+ level = machine_get_cache_topo_level(ms, CACHE_LEVEL_AND_TYPE_L1I);
+ if (level == topo_level) {
+ *level_found = 1;
+ return true;
+ }
+
+ level = machine_get_cache_topo_level(ms, CACHE_LEVEL_AND_TYPE_L1D);
+ if (level == topo_level) {
+ *level_found = 1;
+ return true;
+ }
+
+ level = machine_get_cache_topo_level(ms, CACHE_LEVEL_AND_TYPE_L2);
+ if (level == topo_level) {
+ *level_found = 2;
+ return true;
+ }
+
+ level = machine_get_cache_topo_level(ms, CACHE_LEVEL_AND_TYPE_L3);
+ if (level == topo_level) {
+ *level_found = 3;
+ return true;
+ }
+
+ return false;
+}
+
+/*
+ * Check if there are caches defined at a particular level. Currently, we
+ * support only L1, L2 and L3 caches, but this can be extended to more levels
+ * as needed.
+ *
+ * Return True on success, False otherwise.
+ */
+bool machine_defines_cache_at_topo_level(const MachineState *ms,
+ CpuTopologyLevel level)
+{
+ if (machine_get_cache_topo_level(ms, CACHE_LEVEL_AND_TYPE_L3) == level ||
+ machine_get_cache_topo_level(ms, CACHE_LEVEL_AND_TYPE_L2) == level ||
+ machine_get_cache_topo_level(ms, CACHE_LEVEL_AND_TYPE_L1I) == level ||
+ machine_get_cache_topo_level(ms, CACHE_LEVEL_AND_TYPE_L1D) == level) {
+ return true;
+ }
+ return false;
+}
diff --git a/include/hw/boards.h b/include/hw/boards.h
index f424b2b505..1713be992a 100644
--- a/include/hw/boards.h
+++ b/include/hw/boards.h
@@ -55,6 +55,13 @@ void machine_set_cache_topo_level(MachineState *ms, CacheLevelAndType cache,
CpuTopologyLevel level);
bool machine_check_smp_cache(const MachineState *ms, Error **errp);
void machine_memory_devices_init(MachineState *ms, hwaddr base, uint64_t size);
+bool machine_defines_cache_at_topo_level(const MachineState *ms,
+ CpuTopologyLevel level);
+
+bool machine_find_lowest_level_cache_at_topo_level(const MachineState *ms,
+ int *level_found,
+ CpuTopologyLevel topo_level);
+
/**
* machine_class_allow_dynamic_sysbus_dev: Add type to list of valid devices
--
2.43.0